ISL6528CB

Overview

The ISL6528CB is a dual regulator power controller manufactured by Intersil, now part of Renesas Electronics. It integrates a standard buck PWM controller and a linear (LDO) controller within a single 8-SOIC package. The device operates with a switching frequency of 600kHz and supports a supply voltage range of 4.5V to 5.5V. Designed for surface mount installation, it functions within an operating temperature range of 0°C to 70°C. The component provides two distinct output control paths: one synchronous buck converter and one low-dropout linear regulator, suitable for applications requiring combined high-efficiency switching and precise linear regulation.

Feature Summary

• Integrates a synchronous buck PWM controller and a linear LDO controller in a single package
• Operates at a fixed switching frequency of 600kHz for efficient power conversion
• Supports a wide input supply voltage range from 4.5V to 5.5V
• Utilizes an 8-pin SOIC surface-mount package for compact board integration

Applications

• Dual-rail power distribution systems requiring mixed switching and linear regulation
• Embedded systems needing a stable core voltage via buck and auxiliary rails via LDO
• Industrial control boards with space-constrained power management requirements

Procurement Notes

Verify the specific suffix and RoHS compliance status carefully, as the base model has variants with different environmental certifications. Confirm availability through authorized distributors or secondary market suppliers like Rochester Electronics, as the original manufacturer lists this item as discontinued. Ensure the source documentation matches the exact part number to avoid confusion with lead-free or tape-and-reel versions.

Selection Notes

Select this component when a design requires both a synchronous buck converter and a linear regulator from a single 5V rail. It is appropriate for applications where board space is limited and a combined PMIC solution is preferred over discrete components. Consider the 600kHz switching frequency for balancing efficiency and passive component size. Verify that the thermal performance of the 8-SOIC package meets the system's heat dissipation requirements under maximum load conditions.

Part Context

The ISL6528CB belongs to the Intersil/Renesas ISL652x family of dual regulators. This series typically pairs a high-current switching controller with a precision linear regulator to serve complex power sequencing needs in computing and industrial electronics. The CB suffix generally denotes a specific commercial grade and packaging variant within this product line, distinguishing it from other temperature ranges or reel configurations.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Users should consult official Renesas cross-reference tools or datasheets for compatible alternatives such as the ISL6529 series, noting differences in pin counts and output capabilities.